engleski

Facile synthesis of chitin nanocrystal decorated on 3D cellulose aerogel as a new multi-functional material for waste water treatment with enhanced anti-bacterial and anti-oxidant properties

We report fabrication and application of multi- functional hybrid bio-aerogels based on cellulose nanofibers (CNF) and chitin nano crystals (CNC) developed through environmental friendly freeze- drying process. Herein, organic non-solvent approach such as acid hydrolysis was used to extract CNF and CNC from corn husk and shrimp shell respectively followed by characterisation using IR spectroscopy and electron microscopy. Usual wired like and infrequent semi-square type of morphology were detected for CNF and CNC respectively during electron microscopic analysis. The aerogels with two different quantities of CNC on CNF were made (AR1 and AR2) and compared them with reference to the neat CNF aerogel (neat AR). Interestingly, for AR2, under the electron microscopy, a maple seed like morphology was observed compared to neat AR and AR1. Their ability in water treatment were determined by conducting adsorption experiment using methylene blue and Rhodamine 6G, found that AR2 has enhanced removal percentage and adsorption capacity. To addressing their economic viability, we conducted several rounds of studies and evaluated the reusability of AR2. Anti- bacterial and anti- oxidant activities of aerogels were studied using disc diffusion method against four bacterial species such as St. aureus, E. coli, S. typhimurium and B. Cereus and carefully discussed the best condition for the determination of minimal inhibitory concentration. The prepared material having higher CNC content (AR2) shows multi- functional behaviour and in the future further studies are anticipated to produce them in industrial scale for commercial application

Aerogels, Cellulose, Chitin, Hybrid bio-aerogels, Anti-bacterial

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